Joan and Melissa Rivers' "Fashion Police" is one of E!'s top shows in England and the US. Photo: Gregory Pace / BEImages

Joan Rivers has some choice words for Lady Gaga after the singer posted an open letter claiming her hit show, E!’s “Fashion Police” “breeds negativity.”

“Anyone that would wear a pastrami dress or sit in an egg should know about humor,” Rivers tells Page Six. “She knows exactly what’s she’s doing. She’s not selling. We haven’t been talking about her until now.”

Joan’s daughter, Melissa, reveals, “Kelly [Osbourne] was receiving these horrible threats from Gaga’s fans and they did communicate privately about it. Months later she responds publicly? Our show is comedy. It’s satire in the truest form. So many horrible things are going on in the world; we all need to laugh.”

Joan chimes in, “It’s time to start laughing. We’ve been doing this for fifty years. Tell Lady Gaga to worry about the maggots in her brain from the meat dress! But I told Kelly that it’s all good because it means Lady Gaga watches ‘Fashion Police’!”

And she’d be welcome there any day. Executive Producer Melissa insists, “We’d love to have her as a guest!”

An E! spokesperson responded to the controversy, telling Page Six, “We value strong points of view on our air and greatly appreciate the clever commentary and opinions of our ‘Fashion Police’ team.”